Abstract
The interaction of hydrogen peroxide with various metal oxides has been followed by EPR in the aim of investigating the paramagnetic species formed along the complex processes of H2O2 decomposition and interaction with the oxide. Data are reported about three systems (MgO, ZrO2 and Me2+/Y zeolite) which are representative of three classes of oxides (insulators, semiconductors and aluminosilicate molecular sieves). Several radical species have been put into evidence in the various cases. The superoxide O −2 ion has been observed in all cases while in the case of MgO also the OH radical and the O− radical ion have been identified. In the case of Zn2+/Y zeolite, beside the superoxide radical anion, a new signal is observed which shows up upon treating the sample at 640 K and which is preliminarily assigned to a species in the triplet state in the zeolitic cavity.
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Giamello, E., Rumori, P., Geobaldo, F. et al. The interaction between hydrogen peroxide and metal oxides: EPR investigations. Appl. Magn. Reson. 10, 173–192 (1996). https://doi.org/10.1007/BF03163108
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DOI: https://doi.org/10.1007/BF03163108